Cutter-head.



Patented Apr., 22, |902.

No. 698,33I.

E. SHIMER.

CUTTER HEAD'. 'mppucmon med me. 4, 1901.)

2 Sheets-Sheet '-(nn Model.;

No. 698,33l`.

Patented Apr. 22 |902. a E. S. SHIMER. CUTTER HEAD.- (Appliation filedDec. 4, 1901.)

2 Sheets-Sheet 2 (No Model.)

' NITED STATES Parent OFFICE.

ELMER S. SHIMER,`-OF MILTON, PENNSYLVANIA.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 698,331.,datedApr-il'22, 1902.`

Application filed December 4, 1901. Serial No. 84,691. (No model.) l yTo all whom it may concern.:

Be it known that I, ELMER vS.SHIMa1a, a citizen of the United States,residing at Milton, in the county of Northumberland and State ofPennsylvania, have invented new and useful Improvements in Cutter-Heads,of which the following is a specification.

My invention relates to cutter-heads; and the object of the same is toconstruct a cutter-head of maximum compactness in which vall of the bitsthereon operate on the Whole surface of the work exclusive of the sidesof the tongue or groove. The novel construction by which this object isaccomplished is described and claimed in this specification andillustrated in the accompanying draw.

ings, forming a part thereof, in which- Figure l is a side elevation ofmy cutterhead. Fig. 2is avertical longitudinal section through one setof bits. Fig. 3 is a vertical longitudinal section of the other set ofbits. Fig. 4 is a bottom plan of my cutter-head.V Fig. 5 is adiagrammatic view illustrating the clearance-bits of oppositeinclinations.

The body of the cutter-head employed by me is of the standardnonexpansible form, with a hollow hub l and a circular iange 2. Formedonthe outer face of the flange 2, adjacent to the periphery thereof, arefour bitseats located diametrically opposite to eachV other, with theircenters all situated at equal distances from the'axis of rotation and inthe same plane of rotation. The seats 3 of two of the opposed bits aredownwardly inclined, as viewed in Figs. l, 2, and 3, the angles ofinclination being measured from the outer end of the radius beyond thecenter as the line of zero inclination and not, as in trigonometry,always from the right of the origin to radial lines drawn through their'centers and lying in the said plane of rotation, while the seats 4 ofthe other two are upwardly inclined ,with respect to similarly-drawnradial lines.

grooves.

in the seats 4, and these bits are frusto-conical and seated on theirsmall bases-that is, they are inverted frustums,

It should be notedv that-the opposed bits have the same degree ofinclination relative to the plane of rotation and that the axes of f theopposed bits if prolonged in each direc-y tion would intersecttheaxis'of the cutterhead. The axes of one pair of opposed vbits wouldintersect on one side of the fiange 2, While the axes of the other pairwould intersect on the other side. Therefore we may say' that the axesofone pair converge and the axes ofthe other pair diverge. The points onone side of the plane of revolution of the centers, while the pointsofclearance of the other set come on the opposite side of said plane. l H

The advantages of my construction can now be set forth. By arranging thebits on one side of the head the bits are admitted down into the cup,which prevents the scattering of chips around the planer-spindle to suitany machine. When arranged on alternate sides of the flange, the cupofmany machines is not deep enough to accommodate the cutters. Hence theadvantages of the abovedescribed form. When the bits are arranged inalternate inwardly and outwardly inclined seats, they will cut bothedges of a tongue or groove with clearance. The bits resting upon theupwardly-inclined seats will cut` the uppei-,portion of the groove, andthe oppositelyinclined bits will'cut the lower portion of theTongue-bits would cut just oppo'- sitely. It will be seen that thetongue or groove would be cut with clearance at the leading portions Aand B ot these bits.

` Another advantage of my construction is that all parts of the Work butthe tongue or groove itself have all'the cutting edges working on it,since the broad edges offthe bits are parallel to the axis of rotationof the cutlofi ter-head, (see Fig.` 5,) which in the ordinaryconstruction is only true of the overlapping portion. This is veryimportant, as in matched `lumber the quality of the tongue and groove 7oof clearance of one set ot opposed bits come is largely judged by thesmoothness of the square face above and below the tongue. In general thesmoothness of a facefis proportioned to the number of cutting edgesWorking on it. Therefore by means of myim proved cutter the nish of theWork will be greatly improved.

Having described my invention, what I claim as new, and Wish to secureby Letters Patent, is-

1. The combination with the body of a cutter-head comprising a hubbearing a circular flange, of inclined surfaces constituting bitseats,formed on one side of said i'lange with their centers in the same planeof revolu tion, said seats being arranged dialnetrically opposite eachother in pairs and there being two pairs, the opposed seats having thesame degree of inclination with respect to the plane of revolution, theaxes of one pair of diametrically-opposed seats converging andintersecting the axis of the cutter-head, the axes of the other pair otopposed seats di- Verging and intersecting the axes of the head, andbits mounted in said seats, substantially as described.

2. The combination with the body of a cutterhead comprising a hubbearing a circular flange, of inclined surfaces constituting bitseatswith their centers lying in the same plane of revolution, said seatsbeing arranged diametricallyopposte each other in pairs and there beingtwo pair, the axes of one pair of I diametrically opposite seatsconverging and intersecting the axis of said cutter-head on one side ofsaid Iiange, and the axes of the other pair diverging and intersectingthe axis of said cutter-head on the other side of said flange, a pair ofupright frusto-conical bitseats in one pair of opposed seats andinverted frusto-conical bits seated in the other pair of opposed seats,said bits being secured by bolts fitting said apertures, substantiallyas described.

3. The combination with the body of a cutter-head comprising a hubbearing a circular flange, inclined surfaces constituting bit-seatsformed on one side of said flange with their centers in the same planeof revolution, said seats being arranged diametrically opposite eachother in pairs and there being two pair, the axes on one pair ofdiametrically-opposed seats converging and intersecting the axis of thecutter-head on one side of said ange, the axes of the other pair ofopposed seats dverging and intersecting the axis of the cutter-head onthe other side of said Iiange, and bits mounted in said seats,substantially as described. t

In testimony whereof l have hereunto set my hand in presence of twosubscribing witnesses.

ELMER S. SHIMER.

Vitnesses:

PETER J. Cnis'rn, EDWIN PAUL.

